On Thu, 19 Oct 2017 14:15:54 -0700, "Bob La Londe"
wrote:

"Leon Fisk" wrote in message news
On Wed, 18 Oct 2017 19:52:26 -0700
"Bob La Londe" wrote:

A while back I watched a video by Joe Pieczynski on pressure turning. I
immediately thought, "Now that's something I'll never use."

https://www.youtube.com/watch?v=0DrI5B4hui0

Yesterday I bought some great price carbide blades for my 12" radial arm
saw. They didn't fit. No big deal. I have a lathe or three. I'll just turn
one of the arbors to fit. The little lathe is still all apart for the
duration. The middle weight is pretty much dedicated to small rod stock
collet operations so I walked over to the 1 ton 1440 and grimaced. I could
have used a couple parallels behind the stock, and shimmed it on the 3 jaw,
or I could have swapped out for the 4 jaw and dial it in, but what a pain.

Instead I used a live center to get concentric, and pressure turned it up
against the front of the jaws of the 3 jaw. I wasn't sure if my Chinesium
lathe would be up to the task, but it turned out to be dead easy.

Here it is. https://youtu.be/yMwaUokwDaY

Thanks for that. Like you, not sure if I'll ever use it but nice to
know. I saw in the comments a recommendation for a live center with
a built in spring. That way if the tail stock works loose some it won't
fly away quite so quick

********

That would be handy for tapping too.

In case you run into any old machining books or old-timers like me,
keep in mind that a "live center" is not a dead ball-bearing center.
That's a dead ball-bearing center. g

A live center is one that's under power -- like a center in the
headstock.

The terminology has changed, but it's something to be aware off,
because a lot of the reference material for amateur machinists, such
as the old Colvin and Stanley books and the MAP books, uses the old
terms.

--
Ed Huntress